Zookeeper::getChildren

(PECL zookeeper >= 0.1.0)

Zookeeper::getChildren — Lists the children of a node synchronously

説明

public function Zookeeper::getChildren(string $path, callable $watcher_cb = null): array

パラメータ

path: The name of the node. Expressed as a file name with slashes separating ancestors of the node.
watcher_cb: If nonzero, a watch will be set at the server to notify the client if the node changes.

戻り値

Returns an array with children paths on success, and false on failure.

エラー / 例外

This method emits PHP error/warning when parameters count or types are wrong or fail to list children of a node.

警告

Since version 0.3.0, this method emits ZookeeperException and its derivatives.

例

例1 Zookeeper::getChildren() example

Lists children of a node.

<?php

$zookeeper = new Zookeeper('localhost:2181');
$path = '/zookeeper';
$r = $zookeeper->getchildren($path);

if ($r) {
    var_dump($r);
} else {
    echo 'ERR';
}

?>

上の例の出力は以下となります。

array(1) {
  [0]=>
  string(6) "config"
}

参考

Zookeeper::create() - Create a node synchronously
Zookeeper::delete() - Delete a node in zookeeper synchronously
ZookeeperException

関連キーワード:

node Zookeeper children synchronously zookeeper Lists getChildren path watcher method emits ZookeeperException getAcl getClientId callable Expressed slashes separating ancestors nonzero watch server notify client changes